25th August 2026
Yes. The latest development is quite a significant escalation, although it is primarily an economic threat rather than a new military ultimatum.
US Treasury Secretary Scott Bessent has announced what Washington calls “Operation Economic Outcast”, a much broader campaign to economically isolate Iran. He has warned that countries and companies continuing to do business with Iran could themselves face US sanctions.
The language Bessent is using is unusually forceful. He has described the objective as “economic asphyxiation” and previously said the new measures would be designed to collapse the Iranian regime. He has specifically warned countries that continue buying Iranian oil, transferring money to Iran or providing shipping services that the full power of the US Treasury could be used against them.
What has actually happened?
The US has imposed sanctions on roughly 60 Iranian-linked entities, people and vessels, targeting networks involved in oil sales, shipping, finance, weapons and sanctions evasion.
But the really important part is the threat of secondary sanctions.
Washington is effectively saying:
You don't have to be Iranian to be punished. If you continue helping Iran, you may become a target yourself.
That puts countries such as China, Turkey and the UAE in a difficult position because Iran still has important trading relationships with them. China is particularly important because it remains the principal destination for Iranian oil exports.
Interestingly, the US has not yet imposed the most severe threatened penalties on Chinese financial institutions. That suggests Washington is applying pressure while still leaving itself room for negotiation, particularly given the importance of US-China relations.
Why is Bessent doing this now?
There is a very important strategic background.
The US-Iran conflict has effectively reached a stalemate. The war has not produced the decisive political outcome Washington wanted, while Iran remains capable of exerting pressure through the Strait of Hormuz.
That gives Tehran a particularly powerful economic weapon.
If Iran can restrict the movement of oil through Hormuz, it can affect not only the US and Iran but the entire world economy.
That is why today's developments are potentially more important than simply another round of sanctions.
Washington is trying to remove Iran's ability to finance itself, while Iran can threaten to make the economic consequences of that policy much wider.
And Iran is pushing back
Iran has already rejected the latest American threats.
Iranian officials have said they will retaliate and have dismissed the American campaign as unlikely to succeed. Iranian officials also believe that China and Russia will resist Washington's attempt to force them to abandon economic relations with Tehran.
That creates the central question:
Can America really force the rest of the world to stop trading with Iran?
The US has enormous financial power because so much international trade passes through the dollar-based financial system.
But Iran has learned over many years how to evade sanctions, while China, Russia and other countries have strong reasons for resisting American pressure.
The oil market is watching very closely
There is an interesting development here given our recent discussions about oil.
Despite the escalation, oil prices actually fell by more than $2 a barrel today as markets judged that the latest measures had not immediately produced another major physical disruption to supplies.
That doesn't mean the danger has disappeared.
It means traders are currently betting that the latest escalation will remain primarily economic rather than immediately developing into another major military confrontation.
But if Iran responds by seriously restricting oil movements through Hormuz, that calculation could change very quickly.
And that is why I think Bessent's speech deserves attention.
Washington is effectively moving from trying to defeat Iran militarily to trying to make it economically impossible for the Iranian government to continue functioning.
The danger is that Tehran may decide that if it is going to suffer economically anyway, it has little to lose by using its remaining leverage over the Strait of Hormuz.
That is the part I would be watching most closely over the next few days.
will there be knock on affectsof US trade was for canada europe and others
Yes — and I think there is a potentially important knock-on effect, but we need to separate two things that are happening at the same time: the US trade war with Canada and other countries, and the new US economic offensive against Iran.
The immediate effects on Canada and Europe are rather different, but together they could create a more difficult global trading environment.
Canada is already feeling the pressure
The US has just imposed 50% tariffs on about $20 billion of Canadian goods, after trade negotiations collapsed. Canada has announced retaliatory tariffs beginning on 8 September.
The $20 billion sounds enormous, but it is actually only a little over 5% of Canada's exports to the US, so it isn't by itself enough to cripple the Canadian economy. The bigger danger is that the dispute spreads into areas such as cars, steel, aluminium and energy.
Canada and America are extraordinarily integrated economically. Components can cross the border several times before a finished product is produced.
That means a tariff doesn't necessarily affect only the Canadian exporter.
It can increase costs for an American manufacturer as well.
And then the American consumer ultimately pays part of the bill through higher prices.
Europe could be affected without being directly targeted
Europe faces a different problem.
The US is already applying significant tariffs to European goods, including a 10% Section 301 tariff affecting the EU, with additional sector-specific measures.
If the American market becomes more difficult to access, European companies will look for alternative markets.
That could produce two opposing effects.
European consumers could benefit from some goods becoming cheaper because companies have excess products they cannot easily sell in America.
But European manufacturers could face more competition from goods that would previously have gone to the US.
There is another danger.
If America, Canada and Europe all begin putting up trade barriers against one another, companies may start redesigning their supply chains.
That takes time and money.
And uncertainty itself can cause businesses to postpone investment.
The Iran situation adds another layer
This is where Bessent's latest announcement becomes particularly interesting.
The US has launched what it calls "Operation Economic Outcast", targeting Iran and countries and companies helping Iran's economy. The intention is to put severe pressure on Iran's oil trade and financial system.
The US is effectively saying:
If you continue trading with Iran, you may find yourself facing American financial sanctions.
That creates a difficult choice for European companies.
A European company might be perfectly entitled under European law to trade with Iran, but if doing so exposes it to the US financial system's restrictions, the commercial calculation becomes very different.
This is one of America's greatest economic advantages.
It doesn't necessarily have to stop another country trading with Iran directly.
It can make the transaction sufficiently difficult or expensive that companies decide it isn't worth the risk.
And this is where oil becomes crucial
Iran remains a major oil producer, and the Strait of Hormuz is strategically critical.
If the American campaign succeeds in reducing Iranian oil exports and reopening Hormuz, oil prices could actually fall.
That would be good news for Europe and Britain, because lower oil prices reduce transport, heating and industrial costs.
But if Iran retaliates by disrupting shipping through Hormuz, the opposite could happen.
Oil prices could rise sharply.
That would feed into petrol, diesel, aviation fuel, heating costs, transport and ultimately the prices of goods in shops.
So the economic consequences could go in either direction.
And this is why today's reaction in the oil market is interesting: despite the escalation, oil prices actually fell by more than $2 a barrel as traders initially judged that the latest measures had not produced a new physical supply disruption.
Britain is in a particularly interesting position
The UK isn't simply an observer.
Britain has its own trading relationship with America, and British businesses are exposed to US tariffs. The UK is also affected by the wider European economy, even though it is no longer in the EU.
Then there is energy.
If the Iran confrontation pushes oil sharply higher, Britain imports the consequences through fuel and energy prices.
If it eventually produces greater stability in the Gulf and lower oil prices, Britain could benefit.
There is therefore a strange possibility that the same American policy could hurt British manufacturers through trade barriers while helping British consumers through cheaper energy — depending upon what happens next.
And Canada matters to Britain too
This is something that doesn't receive enough attention.
If Canada loses access to part of the American market, it will naturally look elsewhere.
Britain could become one of those alternative markets.
The same applies in reverse. British exporters may find opportunities in Canada if Canadian buyers deliberately reduce their dependence on American suppliers.
But that requires businesses to establish new trading relationships, and that doesn't happen overnight.
The bigger danger is fragmentation
I think this is the issue worth watching.
The world economy has spent decades becoming increasingly integrated.
A component might be designed in Germany, manufactured in Canada, assembled in Mexico and sold in America.
Now governments are increasingly asking:
"What happens if we can't rely on that trading relationship tomorrow?"
Companies are beginning to build redundancy into supply chains.
That may make economies more resilient in a crisis.
But it also makes them more expensive.
And ultimately somebody pays for that extra resilience.
Usually the consumer.
There is a bigger story here
The US-Canada dispute is therefore much more than a quarrel between two neighbouring countries.
The US is simultaneously applying pressure on Canada, Europe and other trading partners while launching an aggressive economic campaign against Iran.
The immediate effects differ, but the underlying message is similar:
America is increasingly prepared to use its enormous economic and financial power to achieve political objectives.
That has consequences for everybody.
Canada is discovering that even America's closest trading partner can be hit with 50% tariffs.
Europe is having to consider how much dependence it should place on the American market.
Companies around the world have to think about whether using the dollar-based financial system could expose them to American sanctions.
And countries such as China are watching very carefully.
For Britain, the consequences could eventually appear in places that seem completely unrelated to Washington — the price of petrol, the cost of imported goods, the competitiveness of British exports and perhaps even interest rates.
The fascinating question is therefore not simply whether America wins its trade disputes.
It is whether the world economy gradually begins to reorganise itself around a less predictable American trading partner.
If that happens, the consequences could last considerably longer than any individual tariff.
And for a country such as Britain, which sits between the American and European economies, that could become a very important economic issue indeed.
yes can you create an article on this topic with a catchy headline
When America Raises the Tariff Walls, Who Pays the Bill? The Trade War's Hidden Cost for Britain
America's trade disputes can sometimes seem rather distant from everyday life in Britain.
A tariff imposed on Canadian goods sounds like a problem for Canadian exporters. A new American restriction on European products sounds like something for Brussels and European manufacturers to worry about.
And a new economic offensive against Iran might appear to belong to an entirely different category.
But increasingly these events are becoming connected.
The United States is using its enormous economic and financial power more aggressively, while countries such as Canada, those in Europe and China are having to decide how much they are prepared to accommodate Washington's demands.
The consequences could eventually reach British businesses and consumers in ways that have little to do with the original disputes.
America is changing the rules of international trade
For decades, the basic assumption behind globalisation was that countries would gradually remove barriers to trade.
Businesses built supply chains around that assumption.
A component could be designed in one country, manufactured in another, assembled somewhere else and eventually sold in the United States.
That system helped keep prices down.
But it also created enormous dependencies.
America is now demonstrating that access to its market can be used as a political weapon.
Tariffs can be imposed on countries that disagree with Washington, while financial sanctions can be used to make international companies think twice about doing business with countries such as Iran.
The message is becoming increasingly clear:
Access to the American economy comes with conditions.
Canada is discovering just how powerful that weapon can be
Canada is perhaps the clearest example because its economy is deeply intertwined with that of the United States.
Goods and components cross the border repeatedly during the manufacturing process.
A Canadian company exporting to America may therefore be only one part of a much larger American supply chain.
A tariff imposed on the Canadian company does not necessarily mean that only the Canadian company pays.
Some of the additional cost can work its way through the supply chain until it eventually reaches American businesses and consumers.
That is one of the great problems with tariffs.
They are often described as though the foreign exporter simply writes a cheque to the American Treasury.
In reality, the economics are much more complicated.
The cost can be shared between exporters, importers, manufacturers and consumers.
Europe faces a similar problem
European companies also have to consider what happens if access to the American market becomes more expensive.
A European manufacturer facing a tariff has several choices.
It can absorb the cost and accept lower profits.
It can raise prices in America and risk losing market share.
Or it can redirect some production and sales towards other markets.
But there is a potential problem with the third option.
If companies cannot sell as much in America, they may all start looking for customers elsewhere.
That could increase competition in European markets.
British companies could find themselves competing against European manufacturers that previously concentrated much more heavily on America.
And the same could happen in other parts of the world.
Then Iran enters the picture
At first glance, the American economic offensive against Iran seems completely separate from the trade disputes.
It isn't.
The United States is increasingly using financial sanctions to try to influence the behaviour of companies and countries outside America.
The latest measures target Iranian oil, shipping and financial networks and threaten businesses that continue to help Iran's economy.
This is a particularly powerful weapon because so much international commerce ultimately touches the dollar-based financial system.
A European company might legally be able to trade with Iran under European rules.
But if doing so puts its access to American banks or financial markets at risk, the calculation changes dramatically.
The company may decide that the Iranian business simply isn't worth the risk.
America doesn't necessarily have to prohibit the trade directly.
It can make the trade sufficiently difficult that companies voluntarily stop doing it.
That is where the rest of the world starts paying attention
Countries such as China have particularly strong reasons to resist this approach.
China has been a major buyer of Iranian oil and has its own strategic reasons for maintaining relationships with countries that Washington wants to isolate.
If China refuses to follow American demands, Washington faces a difficult choice.
It can impose sanctions on Chinese companies or financial institutions.
But doing so could turn an Iranian dispute into another major confrontation between the world's two largest economies.
That is why the situation is potentially much bigger than Iran.
It is becoming a test of how much economic influence the United States can exercise over countries that don't necessarily agree with it.
Oil could become the wild card
For Britain and Europe, the most immediate concern may ultimately be energy.
If the American pressure on Iran reduces Iranian oil exports without causing disruption to shipping, oil prices could fall.
That would be good news.
Lower oil prices would reduce the cost of petrol, diesel, aviation fuel, transport and many industrial processes.
But there is another possibility.
Iran could respond by attempting to disrupt oil shipments through the Strait of Hormuz.
That would be a completely different story.
The Strait is one of the world's most important energy routes. A serious disruption could send oil prices sharply higher.
Suddenly an American-Iranian confrontation would be felt by motorists in Caithness, manufacturers in Aberdeen, airlines at Heathrow and households throughout Britain.
This is why oil prices are such an important indicator of what happens next.
Britain is caught somewhere in the middle
Britain has an unusual position.
It has a close economic and security relationship with America, but geographically and economically it remains deeply connected to Europe.
That means Britain can be affected from both directions.
If American tariffs damage European exporters, British businesses may suffer through weaker European demand.
If American tariffs encourage Canadian companies to look for alternative markets, Britain could potentially benefit from new trading opportunities.
If oil prices rise because of an Iranian confrontation, Britain could face higher inflation.
If oil prices fall, the opposite could happen.
And if international trade becomes more expensive and uncertain, companies may delay investment.
So there is no single "trade war effect".
There are several competing effects happening at the same time.
There could even be opportunities
Trade wars don't necessarily produce only losers.
When one trading relationship becomes more difficult, businesses start looking for alternatives.
A Canadian company that previously concentrated almost entirely on the United States might decide to expand into Britain.
A British company might find that Canadian buyers are deliberately looking for suppliers outside America.
European businesses might develop new markets in Asia.
Countries can adapt.
But there is a difference between adapting to a changing market and operating in a world where the rules can change suddenly.
The latter creates uncertainty.
And uncertainty has an economic cost.
The hidden cost is the supply chain
Perhaps the most important consequence will not be the tariff itself.
It will be the way companies respond to it.
A business that once sourced a component from one supplier may decide it needs two.
A manufacturer may move some production closer to home.
A retailer may stop relying on a single country.
A company may hold larger inventories because it no longer trusts international supply chains to operate smoothly.
All of those decisions make businesses more resilient.
But they also cost money.
And eventually those costs find their way into prices.
The cheap global supply chain of the past was partly built on efficiency.
The emerging system may be built more around security and resilience.
That could mean higher prices for consumers.
Is the world beginning to split into trading blocs?
This may ultimately be the biggest question.
For decades, businesses were encouraged to think globally.
Now governments are increasingly encouraging them to think strategically.
Who can we trust?
Where are our critical supplies coming from?
Could another country suddenly impose tariffs?
Could our bank be sanctioned because of who we trade with?
Could a military conflict close an important shipping route?
Those are questions that would have seemed extreme to many businesses twenty years ago.
They are becoming ordinary considerations.
And Britain cannot simply stand aside
Britain may not control the decisions being made in Washington, Beijing or Tehran.
But it cannot avoid the consequences.
The price of oil, the cost of imported goods, the strength of the pound, the demand for British exports and the cost of borrowing are all influenced by the wider international environment.
That means the trade disputes involving America are not really somebody else's problem.
They are part of the economic environment in which British businesses and households operate.
The great danger is that individual tariffs appear manageable while their combined effect becomes something much larger.
One tariff.
One sanction.
One disrupted shipping route.
One retaliatory measure.
One company moving its supply chain.
Individually, each may seem relatively small.
Together, they could gradually reshape the global economy.
The new world may be more expensive
The world economy spent decades making trade cheaper and more efficient.
We may now be entering a period in which governments are prepared to sacrifice some of that efficiency for political influence, national security and economic independence.
There are perfectly understandable reasons for doing so.
But there is a price.
The hidden cost of the trade war may not be the tariff that makes tomorrow's newspaper headline.
It may be the gradual rebuilding of the global economy around higher costs, more duplication and less certainty.
And ultimately, somebody has to pay for that.
Very often, it will be the person who never knew there was a trade war taking place — until the price on the supermarket shelf, the petrol pump or the energy bill tells them otherwise.